Aerogel blanket

An aerogel blanket having a moisture impregnation rate of 28 days (MIR-28D) of 100 wt % or less, which is calculated by Equation 1 below:

• Moisture impregnation rate of 28 days (MIR-28D, wt %)={(Aerogel blanket weight after impregnation in distilled water of 21±2° C. for 28 days−Aerogel blanket weight before impregnation in distilled water)/Aerogel blanket weight before impregnation in distilled water}×100, [Equation 1]
• wherein the aerogel blanket includes a blanket and a catalyzed sol, the catalyzed sol includes a silica precursor composition,
• the silica precursor composition comprises a silicate containing a hydrophobic group and a tetraalkyl silicate,
• a surface of the aerogel blanket is not modified by a surface modification reaction separate from a hydrophobilizing reaction with the silicate containing a hydrophobic group, and
• the aerogel blanket has a room temperature (23±5° C.) thermal conductivity of 20.0 mW/mK or less.